generated: '2026-08-26'
method: searched
source: https://docs.payengine.co/developer-docs
name: PayEngine API lifecycle
summary: >-
  PayEngine operates a public uptime status page and does deprecate features in writing,
  but it publishes no API versioning scheme, no deprecation policy with notice periods,
  no dated changelog and no SLA. Deprecations are announced inline in the affected
  documentation page rather than through a policy or a Sunset/Deprecation header.
versioning:
  scheme: unstated
  evidence: >-
    No version path segment, version header or dated-version scheme appears in the public
    developer docs. The only versioned artifacts are the CDN-pinned client assets
    (/js/1.0.0/embed.js, /js/1.0.0/securefields.min.js).
  current_version: null
deprecation_policy:
  published: false
  notice_period: null
  sunset_header: false
  deprecation_header: false
  rfc8594: false
  evidence: >-
    No deprecation policy page exists. Deprecations are announced in the body of the page
    documenting the affected feature, with no dated removal commitment.
  observed_deprecations:
  - subject: HMAC-based embedded-UI security
    announced_in: https://docs.payengine.co/developer-docs/getting-started-1/securing-embedded-uis-merchant-session/securing-embeddable-uis
    statement: >-
      "HMAC-based security has been deprecated and will be removed in a future release.
      To secure your web components, please refer to the Embedded UIs using merchant
      session."
    replacement: MerchantSession access token
    removal_date: unpublished
    backward_compatible: true
  - subject: ACH_CREDIT_ISSUED webhook event
    announced_in: https://docs.payengine.co/developer-docs/getting-started-1/10.-available-webhooks
    statement: Listed in the webhook reference as "ACH_CREDIT_ISSUED (deprecated)".
    removal_date: unpublished
status_page:
  published: true
  url: https://status.payengine.co/
  status: 200
  checked: '2026-08-26'
  provider: hosted status page
  features:
  - 90-day uptime calendar
  - overall uptime for last 24 hours / 7 days / 30 days / 90 days
  - status update history
  - email subscription to updates
  machine_readable_feed: not-found
  note: >-
    Uptime data is rendered client-side; no public JSON/RSS status endpoint was found at
    the conventional paths.
changelog:
  published: false
  evidence: >-
    https://www.payengine.co/changelog returns HTTP 404 (checked 2026-08-26), and no
    changelog, release-notes or "what's new" page appears in the docs navigation or in
    llms.txt.
sla:
  published: false
  note: >-
    No uptime or support SLA is published on the public site. PayEngine's pricing is
    contact-sales only, so any SLA is presumably contractual.
support:
  email: support@payengine.co
  phone: '1-800-490-8514'
  demo_request: https://www.payengine.co/demo-request
certification_program:
  published: true
  url: https://docs.payengine.co/developer-docs/certification/partner-certification
  description: >-
    A published partner-certification suite listing the required integration, validation
    and sanity test cases a partner must pass to verify their portal integration - an
    unusual and useful lifecycle artifact.